EP 2009032 B1 20170712 - A PROCESS FOR THE PREPARATION OF HIGH PERFORMANCE POLYPROPYLENE
Title (en)
A PROCESS FOR THE PREPARATION OF HIGH PERFORMANCE POLYPROPYLENE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOCHLEISTUNGSFÄHIGEM POLYPROPYLEN
Title (fr)
PROCÉDÉ DE PRÉPARATION DE POLYPROPYLÈNE HAUTE PERFORMANCE
Publication
Application
Priority
- CN 2007001315 W 20070420
- CN 200610076310 A 20060420
Abstract (en)
[origin: EP2009032A2] The invention discloses a process for preparing high-performance propylene polymers, the process utilizing a high activity, highly stereoselective Ziegler-Natta catalyst and two or more stages of polymerization carried out under different hydrogen concentrations to prepare propylene polymers having broad molecular weight distribution, wherein non-uniformness of isotacticity of molecular chains of the final propylene polymers is improved by adjusting or controlling stereoselectivity of catalytic active sites under different hydrogen concentrations, namely, making the low molecular weight fraction of the polymers having a higher isotacticity and making the high molecular weight fraction of the polymers having a lower isotacticity, thereby overcoming the drawbacks of the propylene polymers having broad molecular weight distribution known in the art. The resulting final polymers have excellent combined properties, in particular, remarkably improved mechanical properties.
IPC 8 full level
C08F 10/06 (2006.01); C08F 2/00 (2006.01); C08F 10/00 (2006.01)
CPC (source: EP KR US)
C08F 2/00 (2013.01 - KR); C08F 2/38 (2013.01 - KR); C08F 10/00 (2013.01 - EP US); C08F 10/06 (2013.01 - KR); C08F 110/02 (2013.01 - US); C08F 110/06 (2013.01 - EP KR US); C08F 2/38 (2013.01 - US); C08F 2/40 (2013.01 - US); Y02P 20/52 (2015.11 - EP US); Y10T 428/139 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE DE IT
DOCDB simple family (publication)
EP 2009032 A2 20081231; EP 2009032 A4 20120509; EP 2009032 B1 20170712; CN 100491458 C 20090527; CN 101058654 A 20071024; KR 101355861 B1 20140127; KR 20080111148 A 20081222; MY 154967 A 20150828; SG 178718 A1 20120329; US 10544242 B2 20200128; US 2009326171 A1 20091231; US 2015246986 A1 20150903; WO 2007124680 A2 20071108; WO 2007124680 A3 20080320
DOCDB simple family (application)
EP 07720888 A 20070420; CN 200610076310 A 20060420; CN 2007001315 W 20070420; KR 20087028293 A 20070420; MY PI20084184 A 20070420; SG 2012005005 A 20070420; US 201514710007 A 20150512; US 29785707 A 20070420